Dynamic Effects on the Mobilization of a Deposited Nanoparticle by a Moving Liquid-Liquid Interface
Dynamic Effects on the Mobilization of a Deposited Nanoparticle by a Moving Liquid-Liquid Interface
复制标题
移动液-液界面对沉积纳米颗粒移动的动态影响
DOI：
10.1103/physrevlett.121.238002
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发表时间：
2018
影响因子：
8.6
通讯作者：
Drazer, German
中科院分区：
文献类型：
--
作者：
Yin, Tianya;Shin, Donglee;Frechette, Joelle;Colosqui, Carlos E.;Drazer, German
利用分子动力学模拟，我们研究了沉积在固体表面的纳米颗粒在液-液界面移动时的命运，这取决于两种液体对固体的润湿程度和驱动力的大小。在驱动力的临界值以下观察到界面钉住。在钉钉的临界驱动力和大接触角值以上，观察到粘滑运动，出现间歇性的界面钉钉和颗粒在界面处滑动。在低接触角时，我们观察到颗粒滚动先于分离，这表明静态模型中不存在的动态效应的重要性。这项工作的发现表明，在动态液-液界面中产生的颗粒动员和去除效率可能被静态模型大大低估。
Using molecular dynamics simulations, we investigate the fate of a nanoparticle deposited on a solid surface as a liquid-liquid interface moves past it, depending on the wetting of the solid by the two liquids and the magnitude of the driving force. Interfacial pinning is observed below a critical value of the driving force. Above the critical driving force for pinning and for large contact angle values we observe stick-slip motion, with intermittent interfacial pinning and particle sliding at the interface. At low contact angles we observe that particle rolling precedes detachment, which indicates the importance of dynamic effects not present in static models. The findings in this work indicate that particle mobilization, and removal efficiencies, originating in dynamic liquid-liquid interfaces can be significantly underestimated by static models.